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Rule Dark Skies

Zermatt - Dark Skies - Alps

Zermatt, Valais, Switzerland

Moonless nights with crystal-clear skies for deep-sky photography

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Zurich
pristinedarkskies weather icon
Next opportunity
Pristine Dark Skies (pristine)
Zermatt
Today · 23:53–03:00 · 3h window
Medium confidence
46%
🌛Moon Altitude-24.5-5.7°
☁️Total Cloud Coverage1.1-16.3%
pristinedarkskies weather icon
Pristine Dark Skies (pristine)
Zermatt
Tomorrow · 23:55–03:00
🌛Moon Altitude:-27.5-3°
Medium

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72-hour requirements breakdown

What passed or failed, hour by hour
8matching hours in the next 92 hoursJump to next match
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time
Europe/Zurich
Astronomical Night
Any
Total Cloud Coverage
≤ 20.0%
Visibility
≥ 12000.0m
Precipitation Chance
≤ 10.0%
Moon Illumination
OR1·B1
≤ 35.0%
Moon Altitude
OR1·B2
≤ 10.0°
Fri, Jun 5
07:00100%1877m93%78%20°
08:0096%4940m98%78%14°
09:0088%9882m93%78%7.4°
10:0049%16667m88%78%-0.87°
11:0056%19711m82%78%-10°
12:0049%6051m87%78%-20°
13:0066%21934m93%78%-30°
14:0077%2740m98%78%-40°
15:0081%15100m77%78%-49°
16:0099%4509m54%78%-57°
17:00100%5281m32%78%-62°
18:00100%7729m36%78%-62°
19:0087%6425m40%78%-58°
20:0098%11737m43%78%-50°
21:00100%183m64%78%-41°
22:0093%159m34%78%-31°
23:0098%197m3.7%78%-20°
Sat, Jun 6
24:0065%436m2.5%78%-10°
01:0051%2839m1.2%78%-0.74°
02:0082%1668m0%69%8.2°
03:00100%2584m13%69%16°
04:00100%6826m26%69%22°
05:00100%12812m39%69%26°
06:00100%7653m53%69%28°
07:0097%8434m67%69%27°
08:00100%7302m82%69%23°
09:00100%24134m67%69%17°
10:0087%24134m53%69%9.2°
11:0083%22194m39%69%0.48°
12:0088%9807m45%69%-9°
13:0099%5036m50%69%-19°
14:00100%21123m56%69%-29°
15:0082%10677m37%69%-38°
16:0075%7008m19%69%-47°
17:0093%4919m0%69%-54°
18:0096%11526m0%69%-57°
19:0053%19898m0%69%-56°
20:0038%24135m0%69%-51°
21:0035%24134m0%69%-44°
22:0021%24135m0%69%-34°
23:0016%24134m0%69%-24°
Sun, Jun 7
24:004.8%24134m0%69%-14°
01:001.1%24134m0%69%-4.1°
02:001.1%24134m0%59%5.7°
03:005%24134m0%59%15°
04:005%24135m0%59%22°
05:005%24135m0%59%29°
06:005%24134m13%59%32°
07:005%24135m26%59%33°
08:005%24134m39%59%31°
09:0012%24134m57%59%26°
10:0053%24134m75%59%19°
11:0020%24135m93%59%11°
12:00100%24134m95%59%
13:00100%23951m97%59%-7.7°
14:00100%8355m99%59%-18°
15:00100%4451m79%59%-27°
16:00100%4396m59%59%-37°
17:0092%21745m39%59%-44°
18:0094%22863m39%59%-50°
19:00100%22418m39%59%-52°
20:00100%23817m39%59%-50°
21:00100%22150m26%59%-45°
22:0047%24053m13%59%-37°
23:005.6%24134m0%59%-27°
Mon, Jun 8
24:002.7%24134m0%59%-17°
01:005%24135m0%59%-7.2°
02:000%24134m0%50%
03:005%24134m0%50%13°
04:005%24134m0%50%22°
05:005%24134m0%50%30°
06:005%24135m19%50%35°
07:005.5%24135m37%50%39°
08:005%24135m56%50%39°
09:0035%24135m65%50%36°
10:0064%24135m73%50%30°
11:0094%24135m82%50%22°
12:0096%24135m86%50%13°
13:0098%24135m90%50%3.7°
14:00100%24135m95%50%-6.2°
15:00100%19952m82%50%-16°
16:00100%15769m69%50%-25°
17:00100%11586m56%50%-34°
18:00100%15769m63%50%-41°
19:00100%19952m70%50%-45°
20:00100%24135m77%50%-46°
21:00100%24135m74%50%-43°
22:00100%24135m71%50%-37°
23:00100%24135m69%50%-29°
Tue, Jun 9
24:00100%23938m68%50%-20°
01:00100%23742m68%50%-10°
02:00100%23545m68%38%0.08°
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity). For OR groups, only one branch is required, so some OR-branch predicates can be ✕ even in a matching hour.

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